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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 11 — Apr. 10, 2006
  • pp: 2535–2539

Ultrafast pump–probe surface plasmon resonance spectroscopy of thin gold films

A. Devižis, V. Vaičikauskas, and V. Gulbinas  »View Author Affiliations


Applied Optics, Vol. 45, Issue 11, pp. 2535-2539 (2006)
http://dx.doi.org/10.1364/AO.45.002535


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Abstract

A time-resolved reflection pump–probe method was combined with a surface plasmon resonance technique in Kretschmann geometry for the investigation of ultrafast light-induced processes in thin films. Transient changes in the gold layer's reflectivity were observed when the layer was excited by 3 ps duration pulses with photon energy exceeding the interband transition and by probing with photon energy close to the interband transition. Comparison of the experimental and modeling results has shown that the imaginary part of the dielectric function of gold increases linearly during excitation, whereas the real part remains unchanged. The decay of the light-induced changes has two components. The first component is faster than the pulse duration, and the second is much longer than 1.5   ns ; they are related to cooling of the electron plasma and lattice, respectively.

© 2006 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(310.6860) Thin films : Thin films, optical properties
(320.7150) Ultrafast optics : Ultrafast spectroscopy

History
Original Manuscript: September 6, 2005
Revised Manuscript: November 7, 2005
Manuscript Accepted: November 12, 2005

Citation
A. Devizis, V. Vaicikauskas, and V. Gulbinas, "Ultrafast pump-probe surface plasmon resonance spectroscopy of thin gold films," Appl. Opt. 45, 2535-2539 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-11-2535

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